40545437 has 2 divisors, whose sum is σ = 40545438. Its totient is φ = 40545436.

The previous prime is 40545409. The next prime is 40545457. The reversal of 40545437 is 73454504.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 35832196 + 4713241 = 5986^2 + 2171^2 .

It is a cyclic number.

It is not a de Polignac number, because 40545437 - 2¹⁴ = 40529053 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40545457) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20272718 + 20272719.

It is an arithmetic number, because the mean of its divisors is an integer number (20272719).

Almost surely, 2^40545437 is an apocalyptic number.

It is an amenable number.

40545437 is a deficient number, since it is larger than the sum of its proper divisors (1).

40545437 is an equidigital number, since it uses as much as digits as its factorization.

40545437 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 33600, while the sum is 32.

The square root of 40545437 is about 6367.5298978489. The cubic root of 40545437 is about 343.5426504011.

The spelling of 40545437 in words is "forty million, five hundred forty-five thousand, four hundred thirty-seven".